Material: Aluminum + Plastic, Application: Wood Working Tool, Standard Slot Size: Width 3/4″(19 mm), Screw size: about 6mm (M6), Thick 3/8″(9.5 mm).
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGTT10, BgcLuBofErtA10, BGCuponation10, 13f142, BGHONEY2110, BG76cfa1, BGSPRING8OFF
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Drillpro 450mm Miter Gauge Box Joint Jig Kit [EU] ($-3)
Price history and price alert
Here is price history (for all/most countries) for Drillpro 450mm Miter Gauge Box Joint Jig Kit. The lowest price was: $53.99.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).